senate committee wants to know what happened and why and why the obama administration's quote initial public assessments of the attack were subsequently proven inaccurate. >> patti ann: nato special forces are putting some of the top police officers through elite training. this sort of training mission is key to plans for the 2014 withdrawal but it comes after green on blue attacks which afghan security forces opened fired on nato trainers. lieutenant colonel north is streaming live from hellman province in afghanistan. >> nato commanders maintain that these green on blue attacks have failed to drive a wedge between the united states and our allies that those special forces that are being trained, we want to see for ourselves. >> these are afghan special police at the nato training center here in the province. the hand picked police officers sent here for advanced training to master skills necessary to protect the afghan people from the taliban. training here is conducted by nato special operators and experienced american law officers. this year, 600 graduates will return to their uni